From Hammersmith Bridge walk upstream on the North bank to Barnes Bridge. Miles of blackberry bushes, pubs with a past, alluring riverbeds, tufted ducks, underwood, planes, moored boats and beagles bathing. On the South bank, walk past Mortlake Stag Brewery, and along the Kew Gardens. Incidentally posh or clammy, but mainly green and bucolic, 8 miles of pastoral joy worth finishing in style with chips and London Pride on Richmond Green, far from the maddening city.